Evidence map›Paper›PMID 25162887›Full record

ArticleThe New England journal of medicine2014

Two clinical phenotypes in polycythemia vera.

Jerry L Spivak, Michael Considine, Donna M Williams, Conover C Talbot, Ophelia Rogers, Alison R Moliterno, Chunfa Jie, Michael F Ochs

Open access · bronzeAbstract read
In one paragraph

Article in The New England journal of medicine, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
3.8field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

40 citing papers in PubMed, 2 syntheses or guidelines pooled it, 89 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
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  6. Review
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  9. Article
  10. Myeloproliferative Neoplasms: Challenging Dogma.Journal of clinical medicine · 2024
    Review
  11. Article
  12. Article
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  14. Review
  15. Article
  16. Article
  17. Article
  18. Platelet Heterogeneity in Myeloproliferative Neoplasms.Arteriosclerosis, thrombosis, and vascular biology · 2021
    Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 1 country.

Jerry L SpivakFrom the Division of Hematology, Department of Medicine (J.L.S., D.M.W., O.R., A.R.M.), Division of Biostatistics and Bioinformatics, Sidney Kimmel Comprehensive Cancer Center (M.C.), and the Basic Science Institute (C.C.T.), Johns Hopkins University School of Medicine, Baltimore; the Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago (C.J.); and the Department of Mathematics and Statistics, College of New Jersey, Ewing (M.F.O.).
Michael Considine
Donna M Williams
Conover C Talbot
Ophelia Rogers
Alison R Moliterno
Chunfa Jie
Michael F Ochs
College of New Jersey · USNorthwestern University · USSidney Kimmel Comprehensive Cancer Center · US

Funding

Tissue BankP01CA108671 · NCI · UNIVERSITY OF ILLINOIS AT CHICAGO · PI Ronald Hoffman · 2006 to 2026
$82.0M
Molecular Pathogenesis of Polycythemia VeraR01HL082995 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI MOLITERNO, ALISON R · 2005 to 2008
$1.6M
NCI NIH HHS CA108671NCI NIH HHS P01 CA108671NHLBI NIH HHS HL082995NHLBI NIH HHS R01 HL082995
6 · The paper itself

Abstract

backgroundPolycythemia vera is the ultimate phenotypic consequence of the V617F mutation in Janus kinase 2 (encoded by JAK2), but the extent to which this mutation influences the behavior of the involved CD34+ hematopoietic stem cells is unknown.

methodsWe analyzed gene expression in CD34+ peripheral-blood cells from 19 patients with polycythemia vera, using oligonucleotide microarray technology after correcting for potential confounding by sex, since the phenotypic features of the disease differ between men and women.

resultsMen with polycythemia vera had twice as many up-regulated or down-regulated genes as women with polycythemia vera, in a comparison of gene expression in the patients and in healthy persons of the same sex, but there were 102 genes with differential regulation that was concordant in men and women. When these genes were used for class discovery by means of unsupervised hierarchical clustering, the 19 patients could be divided into two groups that did not differ significantly with respect to age, neutrophil JAK2 V617F allele burden, white-cell count, platelet count, or clonal dominance. However, they did differ significantly with respect to disease duration; hemoglobin level; frequency of thromboembolic events, palpable splenomegaly, and splenectomy; chemotherapy exposure; leukemic transformation; and survival. The unsupervised clustering was confirmed by a supervised approach with the use of a top-scoring-pair classifier that segregated the 19 patients into the same two phenotypic groups with 100% accuracy.

conclusionsRemoving sex as a potential confounder, we identified an accurate molecular method for classifying patients with polycythemia vera according to disease behavior, independently of their JAK2 V617F allele burden, and identified previously unrecognized molecular pathways in polycythemia vera outside the canonical JAK2 pathway that may be amenable to targeted therapy. (Funded by the Department of Defense and the National Institutes of Health.).

Indexed as

Gene ExpressionPhenotypeAgedAged, 80 and overAntigens, CD34Blood Cell CountConfounding Factors, EpidemiologicFemaleGene Expression RegulationHumansJanus Kinase 2MaleMetabolic Networks and PathwaysMiddle AgedOligonucleotide Array Sequence AnalysisPolycythemia VeraAntigens, CD34JAK2 protein, humanJanus Kinase 2

Identifiers

PMID25162887
PMCPMC4211877
OpenAlexW2157394080

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.